Cut-off valve for internal-combustion engines.



, 0.1. PILLIOD.v

GUT-OFF VALVE FOR INTERNAL COMBUSTION ENGINS,

APPLlcAnoN FILED SEPT. 8, |913.

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' 0.1. PlLL'loD. CUT-OFF VALVE FUR LNTEBNAL COMBUSTION ENGINES. APPLICATION FILED SEPT. s. 1913.

1 1 '78,67 1 t v Patented Apr. 11, 1916.

2 SHEETS-SHEET 2.

GHARLESJ. PILLIOD, OFTOLEDKO, OHIO.

CUT-OFF VALVE FOR `INTERNAL-COIVIBUS'ZITION ENGINES.

Application led September 8, 1913.

To all whom t may concern.'

Be it known that I, CHARLES J. PiLLioD,

-a citizen of the United States of America,

residing at Toledo, in the county of Lucas and State of Ohio, have invented certain new and useful Improvements in Cut-Off Valves for Internal-Combustion Engines, of which the following is a specification, reference being had therein to the accompanying drawings.

The invention relates to valves for controlling internal combustion engines, and it is the primary object of the invention to provide means for cutting off the admission of explosive gases to the engine cylinder, whereby the power may be varied in proportion to the load and without wire drawing the gases.

To this end the invention consists in the construction as hereinafter set forth.

In the drawings; Figure l is a vertical central section through an explosion engine to which my improvement is applied. Fig. 2 is an elevation at right angles to Fig. 1. Fig. 3 is a cross section on line Fig. 1.

A is the cylinder, B the piston, C the pitman rod, and D the crank of an explosion engine of any suitable construction.

My improved valve and cut oii" is preferably of the cylindrical sleeve type, and is also preferably arranged in a case external to the engine cylinder. As shown, E is a valve case which is of cylindrical form with its axis arranged parallel to the axis of the cylinder and which is water jacketed. Within this case are arranged a plurality of reciprocatory sleeves F G H, which are in concentric relation.

Two of the sleeves F and G form the valve for controlling the inlet and exhaust ports during the normal operation of the engine, while the third sleeve H is the cut off, which is operated by any suitable governor mechanism, not shown, to vary the time of closing or opening of the inlet port during the suction stroke. In the specific construction shown, the sleeves F and G are adjacent to each other and are arranged inside of the sleeve H,'which latter is ad]l acent to the outer wall of the valve case. The sleeves F and G are operated through suitable mechanism such as the sprocket and chain connection I which drives the cam shaft J, actuating bell crank levers K which are connected by links L with the respective sleeves F and G. The sleeves are suitably Specification of Letters Patent.

Patented Api'. 1I, 1916.

serial No. 788,661.

ported, so that in the proper sequence inlet and exhaust ports are opened and closed. As shown, these ports connect a central chamber M formed in a core member N within the inner sleeve with the inlet and exhaust ports O and P in the outer case E,

the chamber M being in constant communication with the engine cylinder A.

The cut off sleeve H is operated through the medium of a link Q, connecting with an eccentric R which is operated by a rock arm S connected to a rod T leading to the governor mechanism, not shown. The arrangement is such that a movement of the rock arm S in one direction will raise the sleeve H so that the cooperating inlet ports in the sleeves F and G will be closed earlier than when the sleeve H is in its lowered position. At the same time this is accomplished without restricting or wire drawing the inlet gases as, the full width of the ports will be open up to the time of cut off.

To protect the valve sleeves from overheating, a water chamber U is formed between the central chamber M in the valve case and the walls in contact with the sleeves; and as a similar water chamber is in the outer portion of the case, the sleeves are thoroughly protected. This water chamber U communicates with the outer water chamber V through a suitable passage V. y

While I have shown my valve and cut oli' as arranged in a separate valve casing, it is obvious that the arrangement heretofore employed of the sleeves in concentric relation to the engine cylinder may be used as a. substitute. However, with the latter construction it is impossible to as thoroughly protect the valve from overheating, and I therefore prefer the construction shown.

What I claim as my invention is:

1. In an internal combustion engine, the combination with a valve case having .conn centrically arranged inner and outer portions with registering ports, a water chamber at the interior of said inner portion, a water jacket extending around the exterior of said outer portion, a reciprocatory sleeve valve arranged between the said inner and outer portions and controlling the ports thereof, and an auxiliary sleeve adjustable in relation to said reciprocatory sleeve to produce a variable cutoff.

2. In an internal combustion engine, the combination with a plurality of concentrically arranged reciprocatory sleeve Valves operating to control the inlet and exhaust ports in proper sequence, and an auxiliary reciproca-tory sleeve valve concentric with and adjacent to said first mentioned sleeve valve, and adjustable to vary the point of cutoii'.

3. In an internal combustion engine, the combination of a plurality of concentrically arranged reciprocatory sleeve valves operating to control the inlet and exhaust ports in proper sequence, and an auxiliary reciprocatory sleeve valve concentric with and Working over the rst mentioned sleeve f valves, and adjustable to vary the point of 15 cutoi".

In testimony7 whereof I afiix my signature in presence of two Witnesses.

CHARLES J. PILLlOD. l.Witnesses JULIAN H. TYLER, ANNA GALLAGHER.

Gopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. GJ 

